Group photos that are grouped in date directories into month directories

groupPhotos.rb

#!/usr/bin/env ruby -w

require 'fileutils'

Dir.chdir('/users/josecapo/Pictures')
months = Dir['201?-??-??'].map {|date| date[0..6]}.uniq

months.each do |month|
  FileUtils.mkdir_p(month)
  Dir["#{month}-*"].each do |date|
    FileUtils.mv(Dir["#{date}/*.JPG"], month)
    FileUtils.mv(date, '/tmp')
    puts "#{date}/*.JPG => #{month}"
  end
end